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Analysis of influencing factors for droplets deformation and coalescence in AC electric field
Author(s): 
Pages: 51-58
Year: Issue:  11
Journal: Electric Machines and Control

Keyword:  electrohydrodynamicswater dropletdeformationcoalescenceemulsion;
Abstract: In order to grasp the deformation and coalescence of water droplets in oil during the process of electric dehydration, the study of droplets deformation and coalescence in AC electric field were carried out by the simulation based on the method of flow field coupled in electric field, and the effects of electric field strength, interfacial tension and droplet diameter on the coalescence rate were simulated. The exper-imental study on the crude oil emulsion dehydration under AC electric field was carried out by using the small and medium dehydration test system in laboratory, and the rule of droplets deformation and coales-cence in the emulsion under different conditions were observed and analyzed by the high-speed camera, which verified the veracity of simulation results. The experimental results show that electric field strength, interfacial tension and droplet diameter are the important factors influencing the emulsion dehy-dration rate, the droplets coalescence rate raises with enhancement of electric field strength and droplets diameter and decrease of interfacial tension. However, the excessively high electric field strength causes the electric disperse of droplets.
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